* {
    margin: 0;
    padding: 0;
}

ul,
li {
    margin: 0px;
    padding: 0px;
    list-style: none;
}

.box {
    position: absolute;
    box-sizing: border-box;
    left: 1px;
    top: 257px;


    width: 1439px;
    height: 199px;
    background: #FFFFFF;


}

.clearFix::after {
    content: '';
    display: block;
    clear: both;
}

li {
    position: relative;
    float: left;
    width: 126px;
    height: 141px;
    background: #C4C4C4;
    margin-left: 51px;
}

li::after {
    content: '';
    position: absolute;
    right: -25px;

    width: 1px;
    height: 86px;
    background: #DFDFDF;
}

li:last-child::after {
    /* 只需要将线条的宽度设置为0，线条就会“消失” */
    width: 0;
}